217900640

素因数分解:

$2^5\times 5^1\times {\mathrm{1361879}}^1$

素因数の和:1361894

約数の個数: 24

約数和(自身を含む): 514790640

約数和(自身を除く): 296890000

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 1361879, 2723758, 5447516, 6809395, 10895032, 13618790, 21790064, 27237580, 43580128, 54475160, 108950320, 217900640]

約数ペア:

[(1, 217900640), (2, 108950320), (4, 54475160), (5, 43580128), (8, 27237580), (10, 21790064), (16, 13618790), (20, 10895032), (32, 6809395), (40, 5447516), (80, 2723758), (160, 1361879)]